alphabet. a, b, c,d and so forth. according to the mercury news the overseas reymar was originally supposed to pass under the bridge between the c and d towers. but the pilot, for reason that are not yet know, changed his mind and decided to take the ship between the d and e towers. it was during this maneuver that the tanker collided with tower e. the ship was apparently going about 11.8 knots when it sideswiped the tower, causing millions of dollars in damage to both the bridge and the ship. again, at this point, it's not clear why the pilot changed course or how the tanker struck the tower. in the newsroom, charles clifford kron 4 news. >> pam: there was a bigger than expected turnout today, at the marin county 'gun buy back' program. hundreds of firearms were collected during the event. which was planned in reaction to the 'sandy hook elementary' school massacre. people walked away with as much as two- hundred dollars per gun, no questions asked. it was such a success, that the county ran through the 43-thousand dollars it had raised. in only two hours.